Dam.



W. L. CHURCH. DAM.

AiPLIOATION FILED 0OT.16, 1913.

' l-Lwlfigfi Patnted June 30,1914.

\VVITNEZSEEE UNITED sTA'rns PATENT OFFICE.

' WILLIAM L. CHURCH, OF NEWTON, MASSACHUSETTS, .ASSIGNOR T0 AMBURSENCOMPANY, OF FOSTQN, MASSACHUSETTS, A CORPORATIOQT OF NEW JERSEY.

DAM.

fiaeatfige ian of letters Patent.

Batented June 30, 1914.

Application filed October 16, 1918. Serial No. 795,463.

. ject of my invention is to improve the means for tying the beams tothe buttresses in the manner hereinafter set forth.

One embodiment of my invention is shown in the drawings accompanying andforming a part of this specification, in which- Figure 1 is a frontelevation of the upstream side of a dam embodying my improvement. Fig. 2is a cross-section of the dam shown in Fig. 1; Fig. 3 is a longitu-'dinal section taken on the line 3-3 of Hg. 1.

- In the particular drawings selected for erably of concrete, 2 is theheel, 3 the toe,

and 4 the crest of a dam constructed preferably of reinforced concrete,The separately-molded beams 5 are supported by the buttresses to formthe up-stream deck of the dam, and similar beams 5 constitute thedown-stream deck or apron. If desired, the longitudinal corners of theupper surface of each of the beams may be recessed so that a key-way isformed-between each abutting pair of beams for receiving cementitiousmat'erialb after the beams are placed in position. It. will beunderstood of' course that said key-ways may be dispensed with, and ifemployed, may have any suitable shape. As SllOWm in Fig. 3, theproximate ends of each pair of beams are shaped to form a key-way, widerat the top than at the bottom, so that a correspondingly-shaped keylocated in said keyway and attached to a buttress will oppose any upwardmovement of said beams, and preferably said ends of said beams arebeveled, so that the key way will be wedgeshaped. A tying member 8, suchfor example as a corrugated or twisted metallic rod, is molded in thebuttress and has its upper portion projecting through said keyway.Cementitious material is then placed in the-key-way and becomes firmlybonded to the proximate ends of the beams and to the tying member,thereby forming a key -7, so shaped as to effectually tie the beams tothe buttresses.

It will be understood that various modi- 'fications may be made, in theparticular means hereinbefore described for tying the beams to thebuttresses without departing from the spirit of my invention.

the proximate ends of each opposed pair of beams, and cementitiousmaterial filling said key-way and inclosing the projecting portion ofsaid tying member.

2. A dam comprising a buttress, a deck consisting of separate beamsresting at their ends on said buttress, the proximate ends of eachopposed pair of beams being beveled to form a wedge-shaped key-way, atying member secured to said buttress and projecting upwardly therefrominto said keyway, and a key in said key-way secured to {)he projectingportion of said tying mem- 3. In a dam having a deck consisting ofseparately molded concrete beams resting at their ends on a buttress,means for tying said beams to said buttress comprising in combination atying member embedded in said buttress and projecting upwardly into akey-way formed between the proximate ends of each opposed pair of beams,said key-way being wider at the top than at the bottom, andcementit-ious material filling said key-way and inclosing theprojectingends on said buttress, the proximate ends of" each opposedpair of beams being shaped to form a'key-Way, a tylng member secured tosaid buttress and projecting upwardly In testimony .whereof -L havehereunto therefrom into said key-way, and a corresubscribed my namethisl'l5'th' day of Oct. spondingly shaped key in said key-way se- 1913.

cured to the projecting portion of said tying L. OHURGH.-

5 member, said key and key-way being Waitresses: v. I adapted by theirsha e alone to oppose any AARON C. DANmLe, upward movement 0 said.beams. HOWARD L. 0011mm.

